China's ambassador to Ottawa has accused Canada of "double standards" and disregarding his country's judicial sovereignty, in a diplomatic row sparked by the arrest of Huawei executive Meng Wanzhou at the request of the United States.

Beijing denounced Canada's arrest of Meng Wanzhou, the chief financial officer of Huawei Technologies Co on December 1, 2018 on a US extradition warrant, and threatened reprisals unless the case against Meng was dropped.